diff --git a/httperf/src/lib/list.c b/httperf/src/lib/list.c
index 706c5d0..b627449 100644
--- a/httperf/src/lib/list.c
+++ b/httperf/src/lib/list.c
@@ -126,7 +126,7 @@ list_pop(struct List * l)
 }
 
 void
-list_remove_if_true(struct List *l, int (*action) (Any_Type))
+list_remove_if_true(struct List *l, bool (*action) (Any_Type))
 {
 	struct Node    *n = l->dummy_head;
 
diff --git a/httperf/src/lib/list.h b/httperf/src/lib/list.h
index 4ac8a71..039e20f 100644
--- a/httperf/src/lib/list.h
+++ b/httperf/src/lib/list.h
@@ -32,7 +32,7 @@
 #ifndef list_h
 #define list_h
 
-typedef int     (*list_action) (Any_Type);
+typedef bool    (*list_action) (Any_Type);
 struct List;
 
 struct List    *list_create();